Question

HELP!
Will fan and medal (and leave testimonial too)



Below are the data collected from two random samples of 500 American adults on the number of hours they work per day (rounded to the nearest hour):


Ryan concludes that adults spend a mean of 8 hours working each day. Malia thinks the mean is 9 hours. Who is correct—Ryan or Malia? Explain your answer in two or three sentences. Make sure to use facts to support your answer.

Answer 1

Number of hours of work per day 6 7 8 9 10
Sample A: Number of adults 60 90 145 150 55
Sample B: Number of adults 70 80 140 145 65

Answer 2

Yes thank you I was trying to pull it up but I can't find it XD

Answer 3

lol np

Answer 4

@rishavraj @Qwertty123

Answer 5

@peachpi

Answer 6

@welshfella

Answer 7

are you supposed to combine the samples?

Answer 8

or consider them separately?

Answer 9

I'm not sure my question was all I copyed and pasted. @ColbyMcCreery put the sample table for me but that's what I'm using.

Answer 10

*copied

Answer 11

ya and im glad to put that up for u

Answer 12

ok so what its saying isd to add the first number of sample a to the first number to sample b then round it to the hour and so on

Answer 13

Wait I'm confused :(

Answer 14

basically, you need to find a weighted average.
from sample A, 60 people worked 6 hours
from sample B, 70 people worked 6 hours
So the total number of people working 6 hours is 130.

You need to find the total number of people working each set of hours by adding the A and B samples together. This is the first step

Answer 15

Ok so for
6-130 | 7-170 | 8-285 | 9-295 | 10-120

Answer 16

Now what?

Answer 17

then multiply those sums by the hours and add them all up. This gives the total amount of hours worked by everyone in the two samples.

6(130) + 7(170) + 8(285) + ... and so on

Answer 18

Now I have 780-1,190-2,280-2,655-1,200

Answer 19

=8,105

Answer 20

now do 8105/1000 because there were 1000 people in the combined samples. This is the mean they're asking you for

Answer 21

8.105

Answer 22

So the answer is 8 right?

Answer 23

right

Answer 24

Oh my goodness you are my best friend (btw I love peach pie) THANK YOU!!!!!